Collapsible core.



A. E. WILUANIS. COLLAFSIBLE CORE. APPLlcMloN man 1AN.20 1915.

Panted Dec. 7, l1915.

FI@ 3 flaw/Ww@ MMS@ ivi FN :n ICE.

ALEXANDER E. WILLIAMS, 0F CLEVELAND, OHIO.

COLLAPSIBLE CORE.

Lieaaci.

Application led January 20, 1915.

To all whom it may concern.'

Be it known that I, ALEXANDER E. WIL- LIAMS, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Chio, have invented a certain new and useful Improvement in Collapsible Cores, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to collapsible cores of the kind used in producing hollow concrete walls of the poured variety.

The object of the invention is to provide a core of the above character simple of construction and very cheap of production, and at the same time, highly eliicient in the accomplishment of its purpose. Y

Further objects comprehendedvby my invention are the provision of a core of the collapsible type that may be very easily contracted and expanded; to provide, in such a core, means whereby the core may be handled and suspended in either its contracted or expanded condition; and the provision of a collapsible core the entire surface of which is moved away from the walls of the coreformed cavity upon the operation of the'collapsing mechanism. A feature of'iinportance is the manner in which I utilize cere tain parts of the collapsing mechanism for strengthening the comparatively thin metal shells of which the core is formed. y

In the accompanying drawing I have shown a collapsible core wherein the foregoing objects are attained; and while I will proceed to describe the same in detail, I wish to be understood as to the structural details thereof further than is required by the terms ofthe `annexed claims, and is rendered necessary by the state of the prior art. l

In the drawing, Figure l represents a substantially central vertical section lthrough the core, the plane of the section being indi I cated by the line 1*1 of Fig. 3; Fig. 2 is a vertical section, at right angles to Fig. 1, on the line 2-2 of the former ligure; and Fig. 3 is a horizontalsection on the line 3-3 of Fig. l, the last figure being on a somewhat enlarged scale as compa-red to Figs. 1 and 2.

Taking up a detailed description of the invention by the use Vof reference characters, l and 2 represent opposed shells that are Substantially Ushepe in cross sectiomand Specification of Letters Patent.

that is extremely f shell 1,

not limiting myself Y A6 are in horizontal :alfongside the bars 1l and Patented Bec. 7, 1915. Serial No. 3,345.

the side walls of the shell 1 are spaced far enough apart to receive between them the corresponding walls of the shell 2. Spaced some distance from the vertical edges of the shell 1, and secured to the inner surfaces of thev side walls thereof, are the narrower flanges of the angle plates 3 and t, the wider flanges whereof-extend inward and overlie each other, as clearly shown in FiO. 3.

earing the same relation to the shell 2, are a pair of angle plates 5 and 6. As will be observed from Figs. 1 and 2, the angle plates extend from near the bottom of the core to within a short distance of its upper end, and these angle plates serve to materially stiften the shells 1 and 2. Near their upper and lower ends, the overlying flanges of each pair of angle plates are provided with oppositely inclined slots 3a, 4ta, etc., as shown in Fig. 2.

Secured within the curved portion of the and near= its lower end, is a plate 7 having a slot v7a that is inclined inward and downward from the upper end of the plate and terminates at its lower end in a substantially vertical portion V7". A similar plate 8 is fastened within the curved portion of the upper end of the shell 1 and has a slot 8a that is inclined from its inward and downward, clination of the portion 7l ofthe slot of the former plate, and this slot has a straight portion 8b at its lower end. lIhe plate 8 extends somedistance above the top of the core and is there provided with a horizontal slot 8c, the bottom side of which is preferaccording to the in- Aably in the plane of the top edge of the shell. and 10, precisely The shell 2 is fitted with plates 9 like the plates 7 and 8, re-

spectively, of the shell 1.

i The inclined slots of the angle plates 3 to alinement with the slots of the plates 7 to 10, and all of the slots are of-substantially the same vertical extent.

11 and 12 are bars which extend through the alining upper and lower slots, respectively, of the angle plates 3 to 6, and the ends of these bars terminate in. lateral, rounded studs 13 which pass through the slots of the plates S to 10, and are provided with washers 14 that are held in place by the cotter pins 15.

`16 1s a yoke which straddles the upper ends of the angle plates and extends down 12, and the vertiupper end l bars by the bolts 17.

the shells 1 and vof `the bars 11 'and and I()c of the When it is the yoke 16 is drawn upward, whereupon the studs of the bars 1 1 and 12'will1jtraverse' the inclined slots of the plates 8 to 10, andthe body portions of the bars will rise within the slots of the angle plates 3 to 6,

causing the shells to approach each other and, at the same time, drawing their side walls inward". In this manner all parts of 2' are movedv inward and 'the' cross sectional area ofthe core is reduced. ttention is here directed tothe particular cross sectional shape of4 theY shells. It will be seen that their side walls, some distance back from their vertical edges, are parallel to each other, while the walls converge from these portions toward the rounded' portion of theshell. By 'reason of this, when the core is being contracted, the sli'ghtest movement of the shells toward each other will cause the aforesaid converging portions to immediately leave the concrete.'

The lcore is expanded by' reversing the foregoing operation, and when the studs 13 12 occupy the substantially vertical portions of the slots in the plates 8 to 10, the core is very efectually locked l,against contraction.` It is loften founddesirable, in concrete construction, to support the cores from the upper edges of the side forms, with the cores in expanded condition. This may be very readily accomplished in my improved core by inserting pipes or cylindrical bars through the slots 8 A plates 8 and 10, respectively, allowing the ends of the bars or pipes to rest upon the upper edges of the side, forms. The Yfact that the supporting bars or pipes are cylindrical and act, therefore, as rollers,

allows the core to be suspended even in its collapsed condition and expanded there- `after by the depression of the yoke 16, the supporting bars rolling with respect to the upper walls of the slotsSc and 10, and upon the upper edges of the side forms.y Furthermore, should it be found desirable to lift the 'forms at any time while they are expanded, this may be readily accomplished by inserting va suitable rigid handling device into the slots 8C and 10C. Where the bars 11 and 12. operate within the slots of the angle plates Sto G, the upper and lower edges of the bars are rounded as shown at 11a and 12, respectively. Y

kIn order thatthecore may be handled or 16 while the core is shells of the core to theY relatively movable internal part. Such means isillustrated in thedrawing as a pair of hooks 18,-one of which is pivoted at 19 to each of the wider flanges-of the angle plates l and 6, the hooks being arranged to be thrown over the bar 11 desired to collapse-*the core,

`opposed shells that the opposed panded core.

IIaving thus described my invention, what I claim isz- 1. A. collapsible core comprising a pair of are substantially U- shape in cross section and arranged so that portions of opposed sides of one shell overli'e the outer surfaces of portions of the other, a plate secured to and projecting inward from each side of one shell, each plate having a portion which overlies a portion of the other and provided with a slot, the slots of `the respective plates being oppositely inclined and' adapted to register, a plate secured within the curved portion. of ea ch shell and having a slot that is oppositely inclined with' respect to the slot in the other, and a memberV having slot engaging portions that are arranged to traverse the various slots Ywhen said member is moved.

2. A collapsible core comprising a pair of opposed flexible shells that are substantially U-shape in cross section and arranged so that portions of opposed sides of one shell overlie the outer surfaces of portions of the other, a plate of substantially the length of the shell secured to and projecting inward from each side of each shell, the opposed plates of each shell overlying each other and having oppositely inclined registering slots, a plate secured within the curved portion of each shell and having a slot that is oppositely inclined with respect to the slot in the corresponding plate of the other shell, and a member extending through the registering slots of the first mentioned plates and having slot engaging portions that are arranged to` traverse the slots of the second mentioned plates. Y

3. A collapsible core comprising a pair of opposed shells, a plate secured to and projecting inward from each side of each shell, plates of each shell having oppositely inclined registering slots, and a member extending through registering slots andV having connection with the opposed shells.

4. A collapsible core comprising a pair of opposed shells, a plate secured to and projecting inward from each side of each shell, the opposed plates of each shell having oppositely inclined registering slots, a plate secured within the curved portion of each shell and having a slot that is oppositely inclined with respect to the slot in the corresponding plate of the other shell, the slots of the last mentioned plates terminating at one end in parallel portions, and a member jects above the upper having slot engaging portions that are arranged to traverse the various slots when said member is moved. Y

5. A collapsible core comprising a pair of opposed shells, a plate of substantially the length of the shell secured to and projecting inward from each side of each shell, the opposed plates of each shell having oppositely inclined registering slots, a plate secured within the curved portion of each shell and having a slot that is oppositely inclined with respect to the slot in the corresponding plate of the other shell, a member having slot engaging portions that are arranged to traverse the various slots when said member is moved, and an independent supporting member secured to each shell whereby the core may be suspended. i

6. A collapsible core comprising a pair of opposed shells, a plate secured to and projecting inward from each side wall of each shell, the opposed plate of each shell having oppositely inclined registering slots, a plate secured within the curved portion of each shell near the lower end thereof and having a slot that is oppositely inclined with respect to the slot of the corresponding plate of the other shell, a similar plate secured Within the curved portion of each shell near its upper end and having a` portion which projects above the upper edge of the shell, each plate having slot which corresponds in inclination to the slot of the lower plate of its respective shell, the slots of said upper and lower plates terminating at one end in portions that are parallel to each other, each of the upper plates having a horizontal slot, and a member having slot engaging portions that are arranged to traverse the variousinclined slots when said member is moved. I'

7. A collapsible core comprising a pair.' of opposed shells, a plate of substantially the length of the shell secured to and projecting inward from each side wall of each shell, the opposed plates of each shell having oppositely inclined registering slots, a plate secured within the curved portion of each shell near the lower end thereof and having a slot that is oppositely inclined with respect to the slot of the corresponding plate of the other shell, a similar plate secured within the curved portion of each shell near its upper end and having a portion which proedge of the shell, each plate having a slot which corresponds in inclination to the slot of the lower plate of its respective shell, each of the upper plates having an opening above the plane of the upper edge of the shell, and a member having slot engaging portions that are arranged to traverse the various inclined slots when said member is moved.

8. A collapsible core comprising a pair of opposed shells, a plate secured to and proper and lower ends that jecting inward from each side of each shell,

cured to the curved portion of each shell near its lower end and having a-slot that is oppositely inclined with respect to the slot of the corresponding plate of the other shell, the slots of the last mentioned plates being in substantially the plane of the lower slots of the first mentioned plates, a plate secured within the curved portion of each of the shells near its upper end and having a portion which projects above the upper end of the shell, each ofthe upper plates having a slot that corresponds in inclination to the slot of the lower plate of its respective shell, said upper plates having openings in their upper ends above the plane of the Lipper edges of the shells, the inclined slots of the upper plates being in substantially the plane of` the upper slots of the first mentioned plates, bars which extend through the upper slots of the first mentioned plates and having Vstuds at their ends which occupy the slots of the upper plates, a bar extending through the lower slots at the first mentioned plates and having studs at their ends which occupy the slots of the lower plates, and a yoke that extends across the upper ends of the'iirst mentioned plates and'having branches that depend within the shells and are secured to the aforesaid bars.

9. A collapsible core comprising a pair of opposed shells, a plate secured to and projecting inward from each side of each shell, the opposed plates of each shell overlying each otherand having slots near their upper and lower ends that are arranged to register, the corresponding slots of the two plates being oppositely inclined, a plate secured to the curved portion of each shell near its lower end and having a slot that is oppositely inclined with respect to the slot of the corresponding plate of the other shell, the slots of the last mentioned plate being in substantially the plane of the lower slots of the iirst mentioned plate and terminating at their lower ends in substantially parallel portions, a plate secured within the curved portion of each of the shells near its upper end, each of the Lipper plates having a slot that corresponds in shape to the slot of the lower plate o-f its respective shell, the inclined slots of the upper plates being in substantially the plane of the upper slots of the iirst mentioned plates, bars which eX- tend through the upper slots of the first mentio-ned plates and having studs at their ends which occupy the slots of the upper plates, a bar extending through the lower slots of the irst mentioned plates and having studs at their ends which occupy the of opposed shells,

Vof opposed shells,

slots of the lower plates and a yoke that QX- tcnds acrossy the lupper ends ofthe.

tionedplatcs; and having brancheathat; depend Within the Shells and are Secured t0 the aforesaid bars`.\

10. A collapsible Core comprising a Pair of opposed shells, a plate secured to and projecting inward from each side of each shell, the opposed platesoi each shell overlyingv eaeh other and having slotsnear their upper and lower ends that are arranged to register, the corresponding slots of thetvvo plates.y being oppositely inclined, a member movable longitudinally of the shells, and members having connection with the first mentioned member and with the opposed shells and having portions which occupy `the registering slots,- of the aforesaid. Plates.

11. A, collapsible core comprising aJ pair a plate secured to and projecting invvardV from each side. oeachshell, the'o-pposed platesofl each shell having oppositelyinclined registering slots, aI member movable longitudinally of the` shell, and

- members .having connection with the first mentioned member and; extending throngh registering slots oftheA aforesaid plates and having connection also with the shells.4

12. A collapsible core comprising a pair a' plate secured tov andprojecting inward shell, the opposed plates of each shellhaving oppositely inclined registering slots, a plate Ysecuredvvithin the curved portion o each shell and having a slot that is oppositely inclined with respect to the slot in the correspending plate of the other shell,` a member having slot engaging portions that are ar p ranged to traverse the various inclined slots Cnesff this patent may be obtained f0.1.

from each side Wallof eachv when said member is moved, and means for lcelzging said member against movement with respect to the shells.

13. A collapsible core comprising a pair of opposed. shells, a plate secured to and projecting inward from ea h side Wall of each shell, the opposed plates of each shell having oppositely inclined registering slots a plate secured within the curved portion of each shell and having a slot that is oppositely inclined with respect to the slot in the corresponding plate of the other shell, a device having sloty engaging members. that are arranged to. traverse the various inclined slots when said device is moved, and a hook pivoted to one of the first mentioned plates of each of the shells and arranged to cmbrace certain of the slot engaging members of the aforesaid device when said members are at one end of the slots.

14. A collapsible. core comprising a pair of opposed shells, each shell having side Walls that are connected by a curved portion, the opposed side Walls of each shell beingparallel vertically and horizontally for Some distance from theii1` vertical edges and then converging to the aforesaidA curved portion, said curved; portion being ofv lesser radius than half the distance between the parallel portions of the side walls, and mechanisrn vvithn the shells which operates to move the shells toward each other and the sides of he respective shells inward.

In testimony whereof, I hereunto alix my signature in the resence of two Witnesses. ALEXAIIDER E. WILLIAMS. Witnesses BRENNAN B. Vns'r, HUGH B. MCGILL.

ive cents each, by addressing the Commissioner of Patents. Washingtom). C.

O Uf 

